Respirator



Jan. 25,1927. ,7 8

H. S. OLGARD RESPIRATOR Filed Aug. 4, 1925 V INVENTOR. flaw/y '6. OlganPatented Jan. 25, 1927.

UNITED STATES HARRY S. OLGARD, 0F KOI-ILER, WISCONSIN.

RESPIRATOR.

Application filed August 4, 1925.

This invention relates to a respirator for protecting operativesemployed where the atmosphere is liable to be charged with deleteriousparticles of matter or injurlous gases, and has for its object toprovide, in a manner as hereinafterset forth, a respirator which may bereadily attached against the face of the wearer to enclose the mouth andnostrils and further including means for supplying fresh pure air forinhalation and from which the exhaled air can be separately discharged.

A further object of the invention is to provide, in a manner ashereinafter set forth, an air container and new and novel means forconnecting the same in position with respect to the other elements ofthe respirator, and further with new and novel means for c011- nectingthe container to the body of the wearer.

Further objects of the invention are to provide, in a manner ashereinafter set forth, a respirator which is comparatively simple in itsconstruction and arrangement, strong, durable, compact, thoroughlyefficient in its use, conveniently positioned, and comparativelyinexpensive to manufacture. I

With the foregoing and other objects in view, the invention consists ofthe novel construction, combination and arrangement of parts, ashereinafter more specifically described and illustrated in theaccompanying drawings, wherein is shown an embodiment of the invention,but it is to be understood that changes, variations and modificationscan be resorted to which come within the scope of the claims hereuntoappended.

1n the drawings wherein like reference characters denote correspondingparts throughout the several views:

Figure 1 is a side elevation of a respirator in accordance with thisinvention, showing the adaptation thereof with respect to a personwearing the same.

Figure 2 is a rear elevation thereof, in section.

Figure 3 is a section on line 3-3, ure 2.

Figure 4 is a section on line 4-4., ure 2.

Figure 5 is a section on line 5--5, ure 4.

Figure 6 is a section on line 6-6, ure 2.

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Serial No. 48,123.

Figure 7 the 6- it sat Referring to the drawings in detail, therespirator includes a body portion formed of a rear part generallyreferred to by the reference character 1 and a forward part generallyreferred to by the reference character The rear part providesa shieldand is adapted to enclose the nose and mouth of the wearer, and theforward part provides a combined valved inlet and valved outletmechanism for controlling the inhaling and exhaling of air and to whichleads a pure air supply. 'fhe rear part 1, at its forward end, is formedintegral with the back of the forward part 2.

The rear part 1 comprises a hollow conoidal-shaped member 3 formed oflight metallie material having secured to its rear or larger end apneumatic cushioning element 4 providing a seal, or rather a snug fitthroughout when the body portion is secured against the face of thewearer. The element a is in the form of a tube and is positioned againstthe inner face of the member 3 and projects rearwardly therefrom. Theelement 4 is secured in position by a flexible retaining member 5, whichis positioned against the inner and outer faces of the member 3 andencloses the element 4. Positioned against that part of the member 5which is arranged against the inner face of the mem ber 3, is a bindingstrip 6, which is secured in position by hold-fast devices 7, not onlyextending through the strip 6, but also through that portion of themember 5 arranged against the inner face of the member 3, through themember 3, that portion of the member 5 arranged against the outer faceof the member 3, and a binder strip 8 positioned against that portion ofthe member 5, which is arranged against the outer face of the member 3.The inner face at the is a section on line 7-7, Figrear end of themember 3 is bevelled, as at 9,

and against which is positioned the element 4. When the rear part 1 ofthe body portion is positioned against the face of the wearer, theelement 1 in connection with the member 5 acts as a seal to prevent thepassage of injurious gases or other matter to within the member 3.

Secured-to the outer face of the member 3, at diametrically oppositepoints, that is at the sides of said member 3, as indicated at 10, 11,are rearwardly extending securing straps 12, 13, respectfully, adaptedto be adjustably connected together, as at 14, for the purpose ofsecuring the member 3 in position against the face 15 of the wearer. Thestraps 12 and 13 extend around the back of the head 16 of the wearerwhen the body portion is in operative position. "See Figure 1.

The forward part 20f the body-portionincludes a casing referred togenerally by thereference character '17 and which comprises a rear wall18, a front wall 19, abott'0111-20,-&11Cl' a pair of end walls, 21, 22.The upper corners of the 'casing 17 are rounded, as at 23. The rear wall18 is formed centrally with a combined inlet and outlet"opening 24,which establishes communication betweenwthe chamber 25 formed by thecasing 17' and the chamber 26 provided with the member 3. The forwardend ofthe member-3 *is integral with the wall 18 and registers with thewall of the opening-"'24. Connected 'to or formed integralwiththe'innerface-ofthe end wall 21, at a point between its transversecenter and lower end, is a longitudinally extending partition 27* whichterminates adj acent'the open- 'ing 24--and merges intoa verticallydisposed partition 28' connectedwith or integral with the bottom 20. Thepartitions 27 and 28, in connection with the end 'wa.ll-2l--and bottom20, provide a-pure air inlet chamber '29. The partition 27 is TOlillGflwith an outlet 30 for the chamber and which is employed for establishingcommunication between said chamber 29 and chamber 25. The outlet 30isnormally closedthrough the medium of a-spring controlled-inletvalve 31for the' chamher 25. The valve 31 is pivoted, as at 32,to the wall 2l-andseats onthe top of-the-partition 27 to close the "opening 30. Anexpansion "spring is interposed between the top'wall 34 0f the casing 17andthe valve 81. Sockets' 35 are provided forthe ends of the spring- 33.The endwall 21, below-the par- -tition 27, is provided with an-opening36 and with an inwardly extending hollow coneshaped holder 87, whichregisters-with and forms a continuationof the wallof the opening 36. Theholder 37 extends into the chamber 29 but is of less length than thelength of said chamber.

Arranged within the chamber 25is a verrtically disposed partition 38positioned in proximity toi'the opening 24 on that side opposite theside to which the partition 27 extends towards. The partition 38 is connectedjto or is integral with the top Wall '34 and isof a height lessthan the. height of the chamber 25. The-lower end of the *partition 38terminates i111 an inclined par- .itition 39, which extends towards theof joinder of the end wall 22 with the botportion' of: lthe. respirator.

point tom 20 and is connected with said walls, as at 40. The partition39 is provided with an opening 41 constituting an outlet for the chamber25, and said outlet is normally closed by a spring controlled valve 42,which is pivoted, ascat 43, to the partition 38,

The valve 42 seats on the upper face of the partition 39 to close theopening 41 and is normally maintained in open position by a pullingspring-44, \which is interposed between the top wall 84 of the casing 17and the upper face of-thewalve 42. The ends of the spring 44 areconnected, as at 45. The partitions 38 and 39, in connection-with theend wall 22,top wall 84, front and rearwalls 18, '19, pr0vide an outletchamber 46, and the opening" 41 establishes communication betweenthechambers '25 and 46.

The rearwall 18 of the casing 17, between itsverticalmedian and the endwall 22, is formedwith an opening 47, and em tending: across the lattera foraminous element 48, secured to the rear face of the wall '18 andarranged-within arearwardly extending-collar'l-tl, which is integralwith the wall 18. -The lower portionof the collar 49 is cut. away, as at50, to provide an outlet. A combined protectingand deflecting member ispositioned rearwardly with respect to the foraminous element 48and'which comprises a circular upper portion 51 terminatingin arectangular depending extension 52. The portion 51, for: a part of itslength, is provided with a forwardly extending annular flange 53,Wl1iCl1 S6'2ltSO1'1-tl18 collar 49. A

brace piece 54isint-eg'ral with and extends diametrically of-the'forwardface of the portion 51 and bears againstthe foraminous element 48. Theextension 52 cepends to a pointnear the bottom 20 of the casing 17.

The space betweenthe ends of the flange 53 forms a. continuation of theoutlet 50.

i The front wall 1 9V is. provided centrally :withan opening-5.5,:closed by a removable plug '56 andwhich provides means whereby :accesscan be had to the chamber. 25.

A pure air container is :in'dicatedat 57 2lI1Cl-Wl11l1 conslstsofafle-Xible bag provided with a valved inlettuhe-58 forthe'purposeofzisupplying air to the-container 57. -The 'with an elbow-shaped.nozzle 60, formedwith a conoidal-shaped discharge end 61, which snu rlrliits the holder 37 when thenozzle is secured to the forward part 2 ofthe body See nignre 5. The container 57, when worn, is positioned attheback of the wearer, see-Figure 1, and is retained in such position bya V-shaped --s upport-ing-strap 62,:having each of itswlegs fixedlysecured to the side of the container 57,: as et -63. The forward end ofthestrap 62 is connected to a depending strap 64,190-

sitioned at the front of the wearer and adjustably connected, as at 65,to a vertically extending strap 66, carried by a waist band 67. Theelement a is provided with a valved inlet tube 68.

When the respirator is mounted in position, the wearer, during the actof inhaling, will open the valve 31, thereby permitting of the supply ofpure air from the container 57 into the chamber 25, and which passesthrough the opening 24: to the wearer. During the act of inhaling, thevalve 42 will be moved to close the opening 41. On exhaling, the valve31 will be moved to its seat, closing opening 24, and the valve 42 movedfrom its seat, thereby establishing communication between the chambersand 46 for discharge.

It is thought that the many advantages of a respirator in accordancewith this invention, can be readily understood, and although thepreferred embodiment of the invention is as illustrated and described,yet it is to be understood that changes in the details of constructioncan be had which will fall within the scope of the invention as claimed.

hat I claim is 1. A respirator comprising a combined nose and mouthprotecting element, a casing connected to the forward end thereof andcommunicating therewith and provided with a valve controlled air inletmeans and a valve controlled air discharge means, said casing having adischarge opening at the rear thereof adjacent the forward end of saidelement, a screen extending across said opening, and a combinedprotecting and deflecting element connected to the rear of said casingand opposing said screen and providing means for deflecting thedischarge of air downwardly into the atmosphere, said protecting anddeflecting element further including means for bracing the screen.

2. A respirator comprising an air container having connected therewithan elbowshaped discharge nozzle, a valve controlled air supply anddischarging means adapted to be secured against the face of the wearerand enclose the mouth and nose of the wearer, said means provided withan air inlet chamber, an air receiving chamber and an air outletchamber, said air inlet chamber having supported therein lengthwisethereof a conical shaped tubular member extending from the outer endwall and terminating at a point removed from the inner end wall of saidchamber, said member spaced from the top, bottom and side walls of saidinlet chamber and providing means for frictionally securing andsupporting the discharge nozzle within said chamber.

In testimony whereof, I alfix my signature hereto.

HARRY S. OLGARD.

